Inner Ring

The characteristics and uses of needle roller bearings:  

Needle roller bearings are equipped with thin and long rollers (the length of the roller is 3-10 times the diameter, and the diameter is generally not more than 5mm), so the radial structure is compact, its inner diameter size and load capacity Same as other types of bearings, the outer diameter is the smallest, which is especially suitable for bearing results where the radial installation size is limited. According to different applications, bearings without inner ring or needle roller and cage components can be ed. At this time, the journal surface and shell hole surface matching the bearing directly serve as the inner and outer rolling surfaces of the bearing to ensure load capacity and running performance Same as the bearing with ring, the hardness, machining accuracy and surface quality of the raceway surface of the shaft or housing hole should be similar to the raceway of the bearing ring. This kind of bearing can only bear radial load.